This is one of the longest running, most feature-rich MUDs in the world!

Started in 1991, it has undergone decades of development to become one of the most evolved games available. Kallisti boasts a massive original world, great atmosphere of long time players, excellent combat system including group formations, ranged spells and weapons, optional PK and arena PvP battles, extensive character customization options, player lineages, clans, highly customizable player houses, item crafting, extensively customizable UI, Mud Sound Protocol (MSP), Mud Server Data Protocol (MSDP), extensive blind player support, a Mumble server for live voice chatting to fellow players, and so much more!

This is an a amazing game that you could literally play for a decade and still keep discovering more - you won't be disappointed!